The systems shown in Figure P4.22 are in equilibrium with m = 2.50 kg and = 31.0. If the spring scales are calibrated in newtons, what do they read?

The systems shown in Figure P4.22 are in equilibrium with m = 2.50 kg and θ = 31.0°. If the spring scales are calibrated in newtons, what do they read? (Ignore the masses of the pulleys and strings, and assume the incline is frictionless.)
scale in (a)
N
scale in (b)
N
scale in (c)
N